<action>

Adds an action to an intent filter.
An <intent-filter>
element must contain one or more <action> elements. If there
are no <action> elements in an intent filter, the filter
doesn't accept any Intent objects. See
Intents and
Intent Filters for details on intent filters and the role of action
specifications within a filter.

attributes:

android:name

The name of the action. Some standard actions are defined in the
Intent class as
ACTION_string constants. To assign one of these actions to
this attribute, prepend "android.intent.action." to the
string that follows ACTION_.
For example, for ACTION_MAIN, use "android.intent.action.MAIN"
and for ACTION_WEB_SEARCH, use "android.intent.action.WEB_SEARCH".

For actions you define, it's best to use your app's package name as a prefix to
ensure uniqueness. For example, a TRANSMOGRIFY action might be specified
as follows: